Amphibian Adaptations to Land

1. Amphibians replaced gills with lungs. 2. Skin that prevents loss of water. 3. Eyelids for vision outside of water. 4. An eardrum developed. 5. A tail that disappears in adulthood.

1. Urodela, 2. Anura, 3. Apoda.

1. Egg Stage: External or internal fertilization. 2. Larval Stage: Legless and lives in water. 3. Transformation: Loses gills and grows legs.

<p>An external opening that serves as the exit and entrance for the intestinal, reproductive, and urinary tracts.</p> Signup and view all the answers

<p>Fertilization of the egg outside the body.</p> Signup and view all the answers

<p>Fertilization of the egg within the body of the female.</p> Signup and view all the answers

<p>A process in which an animal's body undergoes dramatic changes in form during its life cycle.</p> Signup and view all the answers

<p>Cold-blooded; an animal's body temperature changes with the surroundings.</p> Signup and view all the answers

<p>Vertebrates with four limbs.</p> Signup and view all the answers

<p>A tough, fibrous protein found in skin, scales, feathers, hair, and nails.</p> Signup and view all the answers

<p>Glands that secrete mucins to absorb water and form slippery mucus.</p> Signup and view all the answers

<p>Heart that has two atria and one ventricle, found in amphibians and reptiles (except crocodilians).</p> Signup and view all the answers

<p>Noise produced by air driven back and forth between the mouth and lungs; used for calling a mate.</p> Signup and view all the answers

<p>The larval form of a frog or toad.</p> Signup and view all the answers

<p>Amphibians reproduce sexually with external or internal fertilization and undergo metamorphosis.</p> Signup and view all the answers

<ol> <li>Lack of a tail in adulthood. 2. Longer back legs modified for jumping. 3. Smooth, moist skin for frogs; warty, dry skin for toads.</li> </ol> Signup and view all the answers

<ol> <li>Keep their tails as adults. 2. Long body with short legs. 3. Ability to regenerate lost limbs.</li> </ol> Signup and view all the answers

<p>Long, worm-like body without legs; evolved from tetrapod ancestors.</p> Signup and view all the answers

<ol> <li>Lungs for breathing air. 2. Four limbs with feet and digits. 3. Ears for detecting sounds.</li> </ol> Signup and view all the answers

<p>Organs through which an animal gets oxygen from the air.</p> Signup and view all the answers

<p>Circulation that supplies blood to all the body except to the lungs.</p> Signup and view all the answers

<p>Blood flow through vessels between the heart and lungs for oxygenation.</p> Signup and view all the answers

<p>A circulatory system consisting of separate pulmonary and systemic circuits.</p> Signup and view all the answers

<p>An American paleontologist and biologist specializing in vertebrate evolution.</p> Signup and view all the answers

<p>Well-developed tetrapod with 4 legs, limbs not strong enough for land.</p> Signup and view all the answers

<p>One of the first amphibian-like tetrapods in fossil records.</p> Signup and view all the answers

<p>Vertebrae, vertebral column, or backbone.</p> Signup and view all the answers

<p>354 to 290 million years ago; characterized by coal deposits and extensive forest swamps.</p> Signup and view all the answers

<p>A period marked by a significant increase in terrestrial species and the emergence of amphibians.</p> Signup and view all the answers

<p>Amphibians with bony skeletons, moist skin, two pairs of limbs, and a three-chambered heart.</p> Signup and view all the answers

<p>Gymnopis; legless, worm-shaped, with moist skin and bony scales.</p> Signup and view all the answers

<p>Salamanders; characterized by four equal-sized feet and heavy insect-feeding habits.</p> Signup and view all the answers

<p>Young animal is born with the same appearance as an adult; no larval stage.</p> Signup and view all the answers

<p>Immature terrestrial phase of newts before returning to water to breed.</p> Signup and view all the answers

<p>The retention of juvenile features in the adult animal.</p> Signup and view all the answers

<p>Amphibians that reach adulthood without undergoing metamorphosis.</p> Signup and view all the answers

<p>Consists of 4300 species of frogs and toads; characterized by jumping abilities and metamorphosis.</p> Signup and view all the answers

<p>Pigment cells that change the color of an organism, allowing for camouflage.</p> Signup and view all the answers

<p>Cells that contain yellow, orange, or red pigment.</p> Signup and view all the answers

<p>Cells that contain silvery, light-reflecting pigment.</p> Signup and view all the answers

<p>Cells that contain black or brown melanin.</p> Signup and view all the answers

<p>A structural adaptation that enables an organism to blend in with its environment.</p> Signup and view all the answers

<p>Breathing that occurs through the skin.</p> Signup and view all the answers

<p>An animal drops the floor of its mouth, drawing in air and then forces it into the lungs.</p> Signup and view all the answers

<p>A type of breathing where the floor of the oral cavity is lowered to draw air in.</p> Signup and view all the answers

<p>A pair of flaps on either side of the larynx responsible for sound production.</p> Signup and view all the answers

<p>The voice box located in the top part of the trachea.</p> Signup and view all the answers

<p>The copulatory embrace of frogs and toads during which the male fertilizes the eggs.</p> Signup and view all the answers

<p>Vertebrates that have jaws.</p> Signup and view all the answers